Gun(s) - symbolizes aggression, anger, and potential danger. You may be dealing with issues of passiveness/aggressiveness and authority/dependence. Alternatively, a gun can represent the penis and male sexual drive. Thus the gun may mean power and impotence.

Getting shot at - a fearful and violent dream experience. It may reflect aggression, powerlessness, release of strong and dangerous emotions, and/or symbolize a conclusive event in a particular situation or relationship.  It suggests that you are experiencing some confrontation in your waking life. You may feel victimized in some situation.

Someone trying to kill you - suggests that you feel you are 'under attack' (emotionally, psychologically,or physically) within your waking life.

Hope this gives you some insight! Good luck!